Optical imaging lens

ABSTRACT

The present invention provides an optical imaging lens. The optical imaging lens comprises seven lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements, the optical imaging lens may shorten system length, enlarge aperture size and promote image height.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to P.R.C. Patent Application No.202010563057.8 titled “Optical Imaging Lens,” filed Jun. 19, 2020, withthe State Intellectual Property Office of the People's Republic of China(SIPO).

TECHNICAL FIELD

The present disclosure relates to optical imaging lenses, andparticularly, optical imaging lenses of mobile electronic devices.

BACKGROUND

As optical imaging lenses continuously evolve, it is more and moreimportant to improve imaging quality such as aberrations and chromaticaberration. However, to meet the requirements, more lens elements maycause greater distance from a first lens element to an imaging plane,but this is not beneficial to offer a compact mobile and digital camera.Therefore, providing a slim optical imaging lens with good imagingquality are also objects to research and design. Further, becauseluminous flux may be increased with small f-number and night sightfunction may be better provided with great image height, other thancompact and slim size, small f-number and great image height may begoals of research and design in the industry.

SUMMARY

The present disclosure provides for optical imaging lenses shorteningsystem length, increasing great field of view and enlarging aperture inview of achieving good imaging quality.

In an example embodiment, an optical imaging lens may comprise sevenlens elements, hereinafter referred to as first, second, third, fourth,fifth, sixth and seventh lens element and positioned sequentially froman object side to an image side along an optical axis. Each of thefirst, second, third, fourth, fifth, sixth and seventh lens element mayalso have an object-side surface facing toward the object side andallowing imaging rays to pass through and an image-side surface facingtoward the image side and allowing the imaging rays to pass through.

In the specification, parameters used here are defined as follows: athickness of the first lens element along the optical axis isrepresented by T1, a distance from the image-side surface of the firstlens element to the object-side surface of the second lens element alongthe optical axis, i.e. an air gap between the first and second lenselements along the optical axis, is represented by G12, a thickness ofthe second lens element along the optical axis is represented by T2, adistance from the image-side surface of the second lens element to theobject-side surface of the third lens element along the optical axis,i.e. an air gap between the second and third lens elements along theoptical axis, is represented by G23, a thickness of the third lenselement along the optical axis is represented by T3, a distance from theimage-side surface of the third lens element to the object-side surfaceof the fourth lens element along the optical axis, i.e. an air gapbetween the third and fourth lens elements along the optical axis, isrepresented by G34, a thickness of the fourth lens element along theoptical axis is represented by T4, a distance from the image-sidesurface of the fourth lens element to the object-side surface of thefifth lens element along the optical axis, i.e. an air gap between thefourth and fifth lens elements along the optical axis, is represented byG45, a thickness of the fifth lens element along the optical axis isrepresented by T5, a distance from the image-side surface of the fifthlens element to the object-side surface of the sixth lens element alongthe optical axis, i.e. an air gap between the fifth and sixth lenselements along the optical axis, is represented by G56, a thickness ofthe sixth lens element along the optical axis is represented by T6, adistance from the image-side surface of the sixth lens element to theobject-side surface of the seventh lens element along the optical axis,i.e. an air gap between the sixth and seventh lens elements along theoptical axis, is represented by G67, a thickness of the seventh lenselement along the optical axis is represented by T7, a distance from theimage-side surface of the seventh lens element to the object-sidesurface of the filtering unit along the optical axis is represented byG7F, a thickness of the filtering unit along the optical axis isrepresented by TTF, a distance from the image-side surface of thefiltering unit to the image plane along the optical axis is representedby GFP, a focal length of the first lens element is represented by f1, afocal length of the second lens element is represented by f2, a focallength of the third lens element is represented by f3, a focal length ofthe fourth lens element is represented by f4, a focal length of thefifth lens element is represented by f5, a focal length of the sixthlens element is represented by f6, a focal length of the seventh lenselement is represented by f7, a refractive index of the first lenselement is represented by n1, a refractive index of the second lenselement is represented by n2, a refractive index of the third lenselement is represented by n3, a refractive index of the fourth lenselement is represented by n4, a refractive index of the fifth lenselement is represented by n5, a refractive index of the sixth lenselement is represented by n6, a refractive index of the seventh lenselement is represented by n7, an abbe number of the first lens elementis represented by V1, an abbe number of the second lens element isrepresented by V2, an abbe number of the third lens element isrepresented by V3, an abbe number of the fourth lens element isrepresented by V4, an abbe number of the fifth lens element isrepresented by V5, an abbe number of the sixth lens element isrepresented by V6, an abbe number of the seventh lens element isrepresented by V7, an effective focal length of the optical imaging lensis represented by EFL, a distance from the object-side surface of thefirst lens element to the image-side surface of the seventh lens elementalong the optical axis is represented by TL, a distance from theobject-side surface of the first lens element to the image plane alongthe optical axis, i.e. a system length, is represented by TTL, a sum ofthe thicknesses of all seven lens elements from the first lens elementto the seventh lens element along the optical axis, i.e. a sum of T1,T2, T3, T4, T5, T6 and T7, is represented by ALT, a sum of six air gapsfrom the first lens element to the seventh lens element along theoptical axis, i.e. a sum of G12, G23, G34, G45, G56 and G67, isrepresented by AAG, a distance from the image-side surface of theseventh lens element to the image plane along the optical axis isrepresented by BFL, a half field of view of the optical imaging lens isrepresented by HFOV, an image height of the optical imaging lens isrepresented by ImgH, and a f-number of the optical imaging lens isrepresented by Fno.

In an aspect of the present disclosure, in the optical imaging lens, thesecond lens element has negative refracting power, a periphery region ofthe object-side surface of the third lens element is concave, the fourthlens element has negative refracting power, an optical axis region ofthe object-side surface of the sixth lens element is convex, an opticalaxis region of the object-side surface of the seventh lens element isconvex, lens elements of the optical imaging lens consist of the sevenlens elements described above, and the optical imaging lens satisfiesthe inequality:

(T5+ImgH)/Fno≥3.200 mm  Inequality (1).

In another aspect of the present disclosure, in the optical imaginglens, an optical axis region of the object-side surface of the secondlens element is convex, a periphery region of the object-side surface ofthe third lens element is concave, an optical axis region of theobject-side surface of the fourth lens element is convex, the sixth lenselement has positive refracting power, lens elements of the opticalimaging lens consist of the seven lens elements described above, and theoptical imaging lens satisfies the inequalities:

ALT/Fno≥2.300 mm; and  Inequality (2); and

T5/(G56+T6)≥1.400  Inequality (3).

In another aspect of the present disclosure, in the optical imaginglens, an optical axis region of the object-side surface of the thirdlens element is concave, an optical axis region of the object-sidesurface of the fourth lens element is convex, the sixth lens element haspositive refracting power, lens elements of the optical imaging lensconsist of the seven lens elements described above, and the opticalimaging lens satisfies Inequality (2) and Inequality (3).

In another example embodiment, other inequality(s), such as thoserelating to the ratio among parameters could be taken intoconsideration. For example:

(T2+G23+T3)/T1≤2.400  Inequality (4);

AAG/(G45+T5)≤2.100  Inequality (5);

(T1+BFL)/(T3+G34)≥2.800  Inequality (6);

TL/(G23+G67)≤5.800  Inequality (7);

(T1+G23)/T4≥2.700  Inequality (8);

(T7+BFL)/(T1+G12)≥1.400  Inequality (9);

EFL/(G12+G23+G67)≤5.000  Inequality (10);

TTL/(T1+T5+G67)≤3.500  Inequality (11);

(G23+BFL)/T2≥4.800  Inequality (12);

T1/G45≥1.300  Inequality (13);

BFL/(G34+G45)≥2.000  Inequality (14);

ALT/(G23+T3)≤4.500  Inequality (15);

EFL/(T6+T7)≥4.500  Inequality (16);

T5/(G45+G56)≥1.700  Inequality (17);

(G23+T5)/T6≥2.500  Inequality (18);

(T6+T7)/(G34+G45)≥1.400  Inequality (19); and/or

ALT/(G56+T6+G67)≤4.000  Inequality (20).

In some example embodiments, more details about the convex or concavesurface structure, refracting power or chosen material etc. could beincorporated for one specific lens element or broadly for a plurality oflens elements to improve the control for the system performance and/orresolution. It is noted that the details listed herein could beincorporated in example embodiments if no inconsistency occurs.

The optical imaging lens in example embodiments may shorten systemlength, enlarge aperture and promote image height in view of achievinggood imaging quality.

BRIEF DESCRIPTION OF THE DRAWINGS

Example embodiments will be more readily understood from the followingdetailed description when read in conjunction with the appended drawing,in which:

FIG. 1 depicts a cross-sectional view of one single lens elementaccording to the present disclosure;

FIG. 2 depicts a cross-sectional view showing the relation between theshape of a portion and the position where a collimated ray meets theoptical axis;

FIG. 3 depicts a cross-sectional view showing a first example ofdetermining the shape of lens element regions and the boundaries ofregions;

FIG. 4 depicts a cross-sectional view showing a second example ofdetermining the shape of lens element regions and the boundaries ofregions;

FIG. 5 depicts a cross-sectional view showing a third example ofdetermining the shape of lens element regions and the boundaries ofregions;

FIG. 6 depicts a cross-sectional view of a first embodiment of anoptical imaging lens having seven lens elements according to the presentdisclosure;

FIG. 7 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a first embodiment of the opticalimaging lens according to the present disclosure;

FIG. 8 depicts a table of optical data for each lens element of a firstembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 9 depicts a table of aspherical data of a first embodiment of theoptical imaging lens according to the present disclosure;

FIG. 10 depicts a cross-sectional view of a second embodiment of anoptical imaging lens having seven lens elements according to the presentdisclosure;

FIG. 11 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a second embodiment of the opticalimaging lens according to the present disclosure;

FIG. 12 depicts a table of optical data for each lens element of theoptical imaging lens of a second embodiment of the present disclosure;

FIG. 13 depicts a table of aspherical data of a second embodiment of theoptical imaging lens according to the present disclosure;

FIG. 14 depicts a cross-sectional view of a third embodiment of anoptical imaging lens having seven lens elements according to the presentdisclosure;

FIG. 15 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a third embodiment of the opticalimaging lens according to the present disclosure;

FIG. 16 depicts a table of optical data for each lens element of theoptical imaging lens of a third embodiment of the present disclosure;

FIG. 17 depicts a table of aspherical data of a third embodiment of theoptical imaging lens according to the present disclosure;

FIG. 18 depicts a cross-sectional view of a fourth embodiment of anoptical imaging lens having seven lens elements according to the presentdisclosure;

FIG. 19 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a fourth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 20 depicts a table of optical data for each lens element of theoptical imaging lens of a fourth embodiment of the present disclosure;

FIG. 21 depicts a table of aspherical data of a fourth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 22 depicts a cross-sectional view of a fifth embodiment of anoptical imaging lens having seven lens elements according to the presentdisclosure;

FIG. 23 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a fifth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 24 depicts a table of optical data for each lens element of theoptical imaging lens of a fifth embodiment of the present disclosure;

FIG. 25 depicts a table of aspherical data of a fifth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 26 depicts a cross-sectional view of a sixth embodiment of anoptical imaging lens having seven lens elements according to the presentdisclosure;

FIG. 27 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a sixth embodiment of the opticalimaging lens according the present disclosure;

FIG. 28 depicts a table of optical data for each lens element of theoptical imaging lens of a sixth embodiment of the present disclosure;

FIG. 29 depicts a table of aspherical data of a sixth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 30 depicts a cross-sectional view of a seventh embodiment of anoptical imaging lens having seven lens elements according to the presentdisclosure;

FIG. 31 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a seventh embodiment of the opticalimaging lens according to the present disclosure;

FIG. 32 depicts a table of optical data for each lens element of aseventh embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 33 depicts a table of aspherical data of a seventh embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 34 depicts a cross-sectional view of an eighth embodiment of anoptical imaging lens having seven lens elements according to the presentdisclosure;

FIG. 35 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of an eighth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 36 depicts a table of optical data for each lens element of aneighth embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 37 depicts a table of aspherical data of an eighth embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 38 depicts a cross-sectional view of a ninth embodiment of anoptical imaging lens having seven lens elements according to the presentdisclosure;

FIG. 39 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a ninth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 40 depicts a table of optical data for each lens element of a ninthembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 41 depicts a table of aspherical data of a ninth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 42 depicts a cross-sectional view of a tenth embodiment of anoptical imaging lens having seven lens elements according to the presentdisclosure;

FIG. 43 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a tenth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 44 depicts a table of optical data for each lens element of a tenthembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 45 depicts a table of aspherical data of a tenth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 46 depicts a table for the values of (T5+ImgH)/Fno, ALT/Fno,T5/(G56+T6), (T2+G23+T3)/T1, AAG/(G45+T5), (T1+BFL)/(T3+G34),TL/(G23+G67), (T1+G23)/T4, (T7+BFL)/(T1+G12), EFL/(G12+G23+G67),TTL/(T1+T5+G67), (G23+BFL)/T2, T1/G45, BFL/(G34+G45), ALT/(G23+T3),EFL/(T6+T7), T5/(G45+G56), (G23+T5)/T6, (T6+T7)/(G34+G45) andALT/(G56+T6+G67) of all ten example embodiments.

DETAILED DESCRIPTION

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumbers indicate like features. Persons of ordinary skill in the arthaving the benefit of the present disclosure will understand othervariations for implementing embodiments within the scope of the presentdisclosure, including those specific examples described herein. Thedrawings are not limited to specific scale and similar reference numbersare used for representing similar elements. As used in the disclosuresand the appended claims, the terms “example embodiment,” “exemplaryembodiment,” and “present embodiment” do not necessarily refer to asingle embodiment, although it may, and various example embodiments maybe readily combined and interchanged, without departing from the scopeor spirit of the present disclosure. Furthermore, the terminology asused herein is for the purpose of describing example embodiments onlyand is not intended to be a limitation of the disclosure. In thisrespect, as used herein, the term “in” may include “in” and “on”, andthe terms “a”, “an” and “the” may include singular and pluralreferences. Furthermore, as used herein, the term “by” may also mean“from”, depending on the context. Furthermore, as used herein, the term“if” may also mean “when” or “upon”, depending on the context.Furthermore, as used herein, the words “and/or” may refer to andencompass any and all possible combinations of one or more of theassociated listed items.

The terms “optical axis region”, “periphery region”, “concave”, and“convex” used in this specification and claims should be interpretedbased on the definition listed in the specification by the principle oflexicographer.

In the present disclosure, the optical system may comprise at least onelens element to receive imaging rays that are incident on the opticalsystem over a set of angles ranging from parallel to an optical axis toa half field of view (HFOV) angle with respect to the optical axis. Theimaging rays pass through the optical system to produce an image on animage plane. The term “a lens element having positive refracting power(or negative refracting power)” means that the paraxial refracting powerof the lens element in Gaussian optics is positive (or negative). Theterm “an object-side (or image-side) surface of a lens element” refersto a specific region of that surface of the lens element at whichimaging rays can pass through that specific region. Imaging rays includeat least two types of rays: a chief ray Lc and a marginal ray Lm (asshown in FIG. 1). An object-side (or image-side) surface of a lenselement can be characterized as having several regions, including anoptical axis region, a periphery region, and, in some cases, one or moreintermediate regions, as discussed more fully below.

FIG. 1 is a radial cross-sectional view of a lens element 100. Tworeferential points for the surfaces of the lens element 100 can bedefined: a central point, and a transition point. The central point of asurface of a lens element is a point of intersection of that surface andthe optical axis I. As illustrated in FIG. 1, a first central point CP1may be present on the object-side surface 110 of lens element 100 and asecond central point CP2 may be present on the image-side surface 120 ofthe lens element 100. The transition point is a point on a surface of alens element, at which the line tangent to that point is perpendicularto the optical axis I. The optical boundary OB of a surface of the lenselement is defined as a point at which the radially outermost marginalray Lm passing through the surface of the lens element intersects thesurface of the lens element. All transition points lie between theoptical axis I and the optical boundary OB of the surface of the lenselement. If multiple transition points are present on a single surface,then these transition points are sequentially named along the radialdirection of the surface with reference numerals starting from the firsttransition point. For example, the first transition point, e.g., TP1,(closest to the optical axis I), the second transition point, e.g., TP2,(as shown in FIG. 4), and the Nth transition point (farthest from theoptical axis I).

The region of a surface of the lens element from the central point tothe first transition point TP1 is defined as the optical axis region,which includes the central point. The region located radially outside ofthe farthest Nth transition point from the optical axis I to the opticalboundary OB of the surface of the lens element is defined as theperiphery region. In some embodiments, there may be intermediate regionspresent between the optical axis region and the periphery region, withthe number of intermediate regions depending on the number of thetransition points.

The shape of a region is convex if a collimated ray being parallel tothe optical axis I and passing through the region is bent toward theoptical axis I such that the ray intersects the optical axis I on theimage side A2 of the lens element. The shape of a region is concave ifthe extension line of a collimated ray being parallel to the opticalaxis I and passing through the region intersects the optical axis I onthe object side A1 of the lens element.

Additionally, referring to FIG. 1, the lens element 100 may also have amounting portion 130 extending radially outward from the opticalboundary OB. The mounting portion 130 is typically used to physicallysecure the lens element to a corresponding element of the optical system(not shown). Imaging rays do not reach the mounting portion 130. Thestructure and shape of the mounting portion 130 are only examples toexplain the technologies, and should not be taken as limiting the scopeof the present disclosure. The mounting portion 130 of the lens elementsdiscussed below may be partially or completely omitted in the followingdrawings.

Referring to FIG. 2, optical axis region Z1 is defined between centralpoint CP and first transition point TP1. Periphery region Z2 is definedbetween TP1 and the optical boundary OB of the surface of the lenselement. Collimated ray 211 intersects the optical axis I on the imageside A2 of lens element 200 after passing through optical axis regionZ1, i.e., the focal point of collimated ray 211 after passing throughoptical axis region Z1 is on the image side A2 of the lens element 200at point R in FIG. 2. Accordingly, since the ray itself intersects theoptical axis I on the image side A2 of the lens element 200, opticalaxis region Z1 is convex. On the contrary, collimated ray 212 divergesafter passing through periphery region Z2. The extension line EL ofcollimated ray 212 after passing through periphery region Z2 intersectsthe optical axis I on the object side A1 of lens element 200, i.e., thefocal point of collimated ray 212 after passing through periphery regionZ2 is on the object side A1 at point M in FIG. 2. Accordingly, since theextension line EL of the ray intersects the optical axis I on the objectside A1 of the lens element 200, periphery region Z2 is concave. In thelens element 200 illustrated in FIG. 2, the first transition point TP1is the border of the optical axis region and the periphery region, i.e.,TP1 is the point at which the shape changes from convex to concave.

Alternatively, there is another way for a person having ordinary skillin the art to determine whether an optical axis region is convex orconcave by referring to the sign of “Radius” (the “R” value), which isthe paraxial radius of shape of a lens surface in the optical axisregion. The R value is commonly used in conventional optical designsoftware such as Zemax and CodeV. The R value usually appears in thelens data sheet in the software. For an object-side surface, a positiveR value defines that the optical axis region of the object-side surfaceis convex, and a negative R value defines that the optical axis regionof the object-side surface is concave. Conversely, for an image-sidesurface, a positive R value defines that the optical axis region of theimage-side surface is concave, and a negative R value defines that theoptical axis region of the image-side surface is convex. The resultfound by using this method should be consistent with the methodutilizing intersection of the optical axis by rays/extension linesmentioned above, which determines surface shape by referring to whetherthe focal point of a collimated ray being parallel to the optical axis Iis on the object-side or the image-side of a lens element. As usedherein, the terms “a shape of a region is convex (concave),” “a regionis convex (concave),” and “a convex- (concave-) region,” can be usedalternatively.

FIG. 3, FIG. 4 and FIG. 5 illustrate examples of determining the shapeof lens element regions and the boundaries of regions under variouscircumstances, including the optical axis region, the periphery region,and intermediate regions as set forth in the present specification.

FIG. 3 is a radial cross-sectional view of a lens element 300. Asillustrated in FIG. 3, only one transition point TP1 appears within theoptical boundary OB of the image-side surface 320 of the lens element300. Optical axis region Z1 and periphery region Z2 of the image-sidesurface 320 of lens element 300 are illustrated. The R value of theimage-side surface 320 is positive (i.e., R>0). Accordingly, the opticalaxis region Z1 is concave.

In general, the shape of each region demarcated by the transition pointwill have an opposite shape to the shape of the adjacent region(s).Accordingly, the transition point will define a transition in shape,changing from concave to convex at the transition point or changing fromconvex to concave. In FIG. 3, since the shape of the optical axis regionZ1 is concave, the shape of the periphery region Z2 will be convex asthe shape changes at the transition point TP1.

FIG. 4 is a radial cross-sectional view of a lens element 400. Referringto FIG. 4, a first transition point TP1 and a second transition pointTP2 are present on the object-side surface 410 of lens element 400. Theoptical axis region Z1 of the object-side surface 410 is defined betweenthe optical axis I and the first transition point TP1. The R value ofthe object-side surface 410 is positive (i.e., R>0). Accordingly, theoptical axis region Z1 is convex.

The periphery region Z2 of the object-side surface 410, which is alsoconvex, is defined between the second transition point TP2 and theoptical boundary OB of the object-side surface 410 of the lens element400. Further, intermediate region Z3 of the object-side surface 410,which is concave, is defined between the first transition point TP1 andthe second transition point TP2. Referring once again to FIG. 4, theobject-side surface 410 includes an optical axis region Z1 locatedbetween the optical axis I and the first transition point TP1, anintermediate region Z3 located between the first transition point TP1and the second transition point TP2, and a periphery region Z2 locatedbetween the second transition point TP2 and the optical boundary OB ofthe object-side surface 410. Since the shape of the optical axis regionZ1 is designed to be convex, the shape of the intermediate region Z3 isconcave as the shape of the intermediate region Z3 changes at the firsttransition point TP1, and the shape of the periphery region Z2 is convexas the shape of the periphery region Z2 changes at the second transitionpoint TP2.

FIG. 5 is a radial cross-sectional view of a lens element 500. Lenselement 500 has no transition point on the object-side surface 510 ofthe lens element 500. For a surface of a lens element with no transitionpoint, for example, the object-side surface 510 the lens element 500,the optical axis region Z1 is defined as the region between 0-50% of thedistance between the optical axis I and the optical boundary OB of thesurface of the lens element and the periphery region is defined as theregion between 50%-100% of the distance between the optical axis I andthe optical boundary OB of the surface of the lens element. Referring tolens element 500 illustrated in FIG. 5, the optical axis region Z1 ofthe object-side surface 510 is defined between the optical axis I and50% of the distance between the optical axis I and the optical boundaryOB. The R value of the object-side surface 510 is positive (i.e., R>0).Accordingly, the optical axis region Z1 is convex. For the object-sidesurface 510 of the lens element 500, because there is no transitionpoint, the periphery region Z2 of the object-side surface 510 is alsoconvex. It should be noted that lens element 500 may have a mountingportion (not shown) extending radially outward from the periphery regionZ2.

In the present disclosure, examples of an optical imaging lens areprovided. Example embodiments of an optical imaging lens may comprise afirst lens element, a second lens element, a third lens element, afourth lens element, a fifth lens element, a sixth lens element and aseventh lens element. Each of the lens elements may comprise anobject-side surface facing toward an object side allowing imaging raysto pass through and an image-side surface facing toward an image sideallowing the imaging rays to pass through. These lens elements may bearranged sequentially from the object side to the image side along anoptical axis, and example embodiments of the lens may have refractingpower of the optical imaging lens consist of the seven lens elementsdescribed above. Through controlling shape of the surfaces and range ofthe parameters, the optical imaging lens in example embodiments mayshorten system length, enlarge aperture and increase image height.

In some embodiments, the lens elements are designed with convex/concavesurface shape and refracting power of lens elements in light of theoptical characteristics. For example, when an optical imaging lensaccording to an embodiment of the invention presents negative refractingpower of the second lens element, a concave periphery region of theobject-side surface of the third lens element, negative refracting powerof the fourth lens element, a convex optical axis region of theobject-side surface of the sixth lens element and a convex optical axisregion of the object-side surface of the seventh lens element, it may bebeneficial to adjust longitudinal spherical aberration and otheraberration and reduce distortion aberration. When the optical imaginglens satisfies (T5+ImgH)/Fno≥3.200 mm, an image height and a luminousflux may be increased efficiently. As such, a pixel size of the opticalimaging lens may be increased properly, and an imaging sensor may acceptmore light to better offer night sight function. Preferably, the opticalimaging lens may satisfy 3.200 mm≤(T5+ImgH)/Fno≤4.200 mm.

In another example, when an optical imaging lens according to anembodiment of the invention presents a convex optical axis region of theobject-side surface of the second lens element, a concave peripheryregion of the object-side surface of the third lens element, a convexoptical axis region of the object-side surface of the fourth lenselement and positive refracting power of the sixth lens element, it maybe beneficial to adjust longitudinal spherical aberration and otheraberration and reduce distortion aberration. Further, when the opticalimaging lens satisfies ALT/Fno≥2.300 mm, the image height and luminousflux may be increased. As such, the pixel size of the optical imaginglens may be properly increased, and the imaging sensor may accept morelight to better offer night sight function. Preferably, the opticalimaging lens may satisfy 2.300 mm≤ALT/Fno≤3.200 mm. When the opticalimaging lens satisfies T5/(G56+T6)≥1.400, the system length may beshortened. Preferably, the optical imaging lens may satisfy1.400≤T5/(G56+T6)≤2.500.

In yet another example, when an optical imaging lens according to anembodiment of the invention presents a concave optical axis region ofthe object-side surface of the third lens element, a convex optical axisregion of the object-side surface of the fourth lens element andpositive refracting power of the sixth lens element, it may bebeneficial to adjust longitudinal spherical aberration and otheraberration and reduce distortion aberration. Further, when the opticalimaging lens satisfies ALT/Fno≥2.300 mm, the image height and luminousflux may be increased. As such, the pixel size of the optical imaginglens may be properly increased, and the imaging sensor may accept morelight to better offer night sight function. Preferably, the opticalimaging lens may satisfy 2.300 mm≤ALT/Fno≤3.200 mm. When the opticalimaging lens satisfies T5/(G56+T6)≥1.400, the system length may beshortened. Preferably, the optical imaging lens may satisfy1.400≤T5/(G56+T6)≤2.500.

When the optical imaging lens further satisfies at least one of theinequalities listed below, the thickness of each lens element and airgap between lens elements may be sustained proper values to avoid anyexcessive value which may be unfavorable to shorten system length andany insufficient value which may increase the production or assemblydifficulty:

(T2+G23+T3)/T1≤2.400, and preferably, 1.200≤(T2+G23+T3)/T1≤2.400;

AAG/(G45+T5)≤2.100, and preferably, 0.900≤AAG/(G45+T5)≤2.100;

EFL/(T6+T7)≥4.500, and preferably, 4.500≤EFL/(T6+T7)≤8.500;

(T1+BFL)/(T3+G34)≥2.800, and preferably, 2.800≤(T1+BFL)/(T3+G34)≤4.000;

TL/(G23+G67)≤5.800, and preferably, 2.900≤TL/(G23+G67)≤5.800;

(T1+G23)/T4≥2.700, and preferably, 2.700≤(T1+G23)/T4≤3.800;

T5/(G45+G56)≥1.700, and preferably, 1.700≤T5/(G45+G56)≤3.200;

ALT/(G23+T3)≤4.500, and preferably, 2.700≤ALT/(G23+T3)≤4.500;

(G23+T5)/T6≥2.500, and preferably, 2.500≤(G23+T5)/T6≤6.800;

(T7+BFL)/(T1+G12)≥1.400, and preferably, 1.400≤(T7+BFL)/(T1+G12)≤2.900;

EFL/(G12+G23+G67)≤5.000, and preferably, 2.200≤EFL/(G12+G23+G67)≤5.000;

(T6+T7)/(G34+G45)≥1.400, and preferably, 1.400≤(T6+T7)/(G34+G45)≤2.900;

TTL/(T1+T5+G67)≤3.500, and preferably, 2.200≤TTL/(T1+T5+G67)≤3.500;

(G23+BFL)/T2≥4.800, and preferably, 4.800≤(G23+BFL)/T2≤5.800;

T1/G45≥1.300, and preferably, 1.300≤T1/G45≤5.000;

BFL/(G34+G45)≥2.000, and preferably, 2.000≤BFL/(G34+G45)≤5.000; and

ALT/(G56+T6+G67)≤4.000, and preferably, 1.800≤ALT/(G56+T6+G67)≤4.100.

In light of the unpredictability in an optical system, satisfying theseinequalities listed above may result in promoting the imaging quality,shortening the system length of the optical imaging lens, lowering thef-number, increasing HFOV and/or increasing the yield in the assemblyprocess in the present disclosure.

When implementing example embodiments, more details about the convex orconcave surface or refracting power could be incorporated for onespecific lens element or broadly for a plurality of lens elements toimprove the control for the system volume, performance, resolution,and/or promote the yield. For example, in an example embodiment, eachlens element may be made from all kinds of transparent material, such asglass, plastic, resin, etc. It is noted that the details listed herecould be incorporated in example embodiments if no inconsistency occurs.

Several example embodiments and associated optical data will now beprovided for illustrating example embodiments of an optical imaging lenswith good optical characteristics, a wide filed of view and/or a lowf-number. Reference is now made to FIGS. 6-9. FIG. 6 illustrates anexample cross-sectional view of an optical imaging lens 1 having sevenlens elements of the optical imaging lens according to a first exampleembodiment. FIG. 7 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 1 according to an example embodiment. FIG. 8 illustrates an exampletable of optical data of each lens element of the optical imaging lens 1according to an example embodiment. FIG. 9 depicts an example table ofaspherical data of the optical imaging lens 1 according to an exampleembodiment.

As shown in FIG. 6, the optical imaging lens 1 of the present embodimentmay comprise, in the order from an object side A1 to an image side A2along an optical axis, an aperture stop STO, a first lens element L1, asecond lens element L2, a third lens element L3, a fourth lens elementL4, a fifth lens element L5, a sixth lens element L6 and a seventh lenselement L7. A filtering unit TF and an image plane IMA of an imagesensor may be positioned at the image side A2 of the optical lens 1.Each of the first, second, third, fourth, fifth, sixth and seventh lenselement L1, L2, L3, L4, L5, L6, L7 and the filtering unit TF maycomprise an object-side surface L1A1/L2A1/L3A1/L4A1/L5A1/L6A1/L7A1/TFA1facing toward the object side A1 and an image-side surfaceL1A2/L2A2/L3A2/L4A2/L5A2/L6A2/L7A2/TFA2 facing toward the image side A2.The filtering unit TF, positioned between the seventh lens element L7and the image plane IMA, may selectively absorb light with specificwavelength(s) from the light passing through optical imaging lens 1. Theexample embodiment of the filtering unit TF which may selectively absorblight with specific wavelength(s) from the light passing through opticalimaging lens 1 may be an IR cut filter (infrared cut filter). Then, IRlight may be absorbed, and this may prohibit the IR light, which mightnot be seen by human eyes, from producing an image on the image planeIMA.

Example embodiments of each lens element of the optical imaging lens 1,which may be constructed by glass, plastic, resin material or othertransparent material and is constructed by plastic material here forexample, will now be described with reference to the drawings.

An example embodiment of the first lens element L1 may have positiverefracting power. On the object-side surface L1A1, an optical axisregion L1A1C may be convex and a periphery region L1A1P may be convex.On the image-side surface L1A2, an optical axis region L1A2C may beconcave and a periphery region L1A2P may be concave.

An example embodiment of the second lens element L2 may have negativerefracting power. On the object-side surface L2A1, an optical axisregion L2A1C may be convex and a periphery region L2A1P may be convex.On the image-side surface L2A2, an optical axis region L2A2C may beconcave and a periphery region L2A2P may be concave.

An example embodiment of the third lens element L3 may have positiverefracting power. On the object-side surface L3A1, an optical axisregion L3A1C may be concave and a periphery region L3A1P may be concave.On the image-side surface L3A2, an optical axis region L3A2C may beconvex and a periphery region L3A2P may be convex.

An example embodiment of the fourth lens element L4 may have negativerefracting power. On the object-side surface L4A1, an optical axisregion L4A1C may be convex and a periphery region L4A1P may be concave.On the image-side surface L4A2, an optical axis region L4A2C may beconcave and a periphery region L4A2P may be concave.

An example embodiment of the fifth lens element L5 may have positiverefracting power. On the object-side surface L5A1, an optical axisregion L5A1C may be concave and a periphery region L5A1P may be convex.On the image-side surface L5A2, an optical axis region L5A2C may beconvex and a periphery region L5A2P may be concave.

An example embodiment of the sixth lens element L6 may have positiverefracting power. On the object-side surface L6A1, an optical axisregion L6A1C may be convex and a periphery region L6A1P may be concave.On the image-side surface L6A2, an optical axis region L6A2C may beconcave and a periphery region L6A2P may be convex.

An example embodiment of the seventh lens element L7 may have negativerefracting power. On the object-side surface L7A1, an optical axisregion L7A1C may be convex and a periphery region L7A1P may be concave.On the image-side surface L7A2, an optical axis region L7A2C may beconcave and a periphery region L7A2P may be convex.

In example embodiments, air gaps may exist between each pair of adjacentlens elements, as well as between the seventh lens element L7 and thefiltering unit TF, and the filtering unit TF and the image plane IMA ofthe image sensor. Please note, in other embodiments, any of theaforementioned air gaps may or may not exist. For example, profiles ofopposite surfaces of a pair of adjacent lens elements may align withand/or attach to each other, and in such situations, the air gap mightnot exist.

FIG. 8 depicts the optical characteristics of each lens elements in theoptical imaging lens 1 of the present embodiment. Please also refer toFIG. 46 for the values of (T5+ImgH)/Fno, ALT/Fno, T5/(G56+T6),(T2+G23+T3)/T1, AAG/(G45+T5), (T1+BFL)/(T3+G34), TL/(G23+G67),(T1+G23)/T4, (T7+BFL)/(T1+G12), EFL/(G12+G23+G67), TTL/(T1+T5+G67),(G23+BFL)/T2, T1/G45, BFL/(G34+G45), ALT/(G23+T3), EFL/(T6+T7),T5/(G45+G56), (G23+T5)/T6, (T6+T7)/(G34+G45) and ALT/(G56+T6+G67)corresponding to the present embodiment.

The totaled 14 aspherical surfaces, including the object-side surfaceL1A1 and the image-side surface L1A2 of the first lens element L1, theobject-side surface L2A1 and the image-side surface L2A2 of the secondlens element L2, the object-side surface L3A1 and the image-side surfaceL3A2 of the third lens element L3, the object-side surface L4A1 and theimage-side surface L4A2 of the fourth lens element L4, the object-sidesurface L5A1 and the image-side surface L5A2 of the fifth lens elementL5, the object-side surface L6A1 and the image-side surface L6A2 of thesixth lens element L6, and the object-side surface L7A1 and theimage-side surface L7A2 of the seventh lens element L7 may all bedefined by the following aspherical formula:

wherein, Y represents the perpendicular distance between the point ofthe aspherical surface and the optical axis; Z represents the depth ofthe aspherical surface (the perpendicular distance between the point ofthe aspherical surface at a distance Y from the optical axis and thetangent plane of the vertex on the optical axis of the asphericalsurface); R represents the radius of curvature of the surface of thelens element; K represents a conic constant; a_(2i) represents anaspherical coefficient of 2i^(th) level. The values of each asphericalparameter are shown in FIG. 9.

Referring to FIG. 7(a), a longitudinal spherical aberration of theoptical imaging lens in the present embodiment is shown in coordinatesin which the horizontal axis represents focus and the vertical axisrepresents field of view, and FIG. 7(b), curvature of field of theoptical imaging lens in the present embodiment in the sagittal directionis shown in coordinates in which the horizontal axis represents focusand the vertical axis represents image height, and FIG. 7(c), curvatureof field in the tangential direction of the optical imaging lens in thepresent embodiment is shown in coordinates in which the horizontal axisrepresents curvature of field and the vertical axis represents imageheight, and FIG. 7(d), distortion aberration of the optical imaging lensin the present embodiment is shown in coordinates in which thehorizontal axis represents percentage and the vertical axis representsimage height. The curves of different wavelengths (470 nm, 555 nm, 650nm) may be close to each other. This represents that off-axis light withrespect to these wavelengths may be focused around an image point. Fromthe vertical deviation of each curve shown therein, the offset of theoff-axis light relative to the image point may be within −0.2˜50 mm.Therefore, the present embodiment may improve the longitudinal sphericalaberration with respect to different wavelengths. For curvature of fieldin the sagittal direction, the focus variation with respect to the threewavelengths in the whole field may fall within −0.2˜0.04 mm, forcurvature of field in the tangential direction, the focus variation withrespect to the three wavelengths in the whole field may fall within−0.2˜0 mm, and the variation of the distortion aberration may be within0˜25%.

According to the values of the aberrations, it is shown that the opticalimaging lens 1 of the present embodiment, with Fno as small as 1.500,the image height as great as 4.788 mm and the system length as short as7.092 mm, may be capable of providing good imaging quality.

Reference is now made to FIGS. 10-13. FIG. 10 illustrates an examplecross-sectional view of an optical imaging lens 2 having seven lenselements of the optical imaging lens according to a second exampleembodiment. FIG. 11 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 2 according to the second example embodiment. FIG. 12 shows anexample table of optical data of each lens element of the opticalimaging lens 2 according to the second example embodiment. FIG. 13 showsan example table of aspherical data of the optical imaging lens 2according to the second example embodiment.

As shown in FIG. 10, the optical imaging lens 2 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop STO, a first lens elementL1, a second lens element L2, a third lens element L3, a fourth lenselement L4, a fifth lens element L5, a sixth lens element L6 and aseventh lens element L7.

The differences between the second embodiment and the first embodimentmay include the radius of curvature, thickness of each lens element, thevalue of each air gap, aspherical data, related optical parameters, suchas back focal length, and the configuration of the concave/convex shapeof the image-side surface L4A2; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L4A1, L5A1, L6A1 and L7A1 facing to the object side A1and the image-side surfaces L1A2, L2A2, L3A2, L5A2, L6A2 and L7A2 facingto the image side A2, and positive or negative configuration of therefracting power of each lens element may be similar to those in thefirst embodiment. Here and in the embodiments hereinafter, for clearlyshowing the drawings of the present embodiment, only the surface shapeswhich are different from that in the first embodiment may be labeled.Specifically, a periphery region L4A2P of the image-side surface L4A2 ofthe fourth lens element L4 may be convex. Please refer to FIG. 12 forthe optical characteristics of each lens elements in the optical imaginglens 2 of the present embodiment, and please refer to FIG. 46 for thevalues of (T5+ImgH)/Fno, ALT/Fno, T5/(G56+T6), (T2+G23+T3)/T1,AAG/(G45+T5), (T1+BFL)/(T3+G34), TL/(G23+G67), (T1+G23)/T4,(T7+BFL)/(T1+G12), EFL/(G12+G23+G67), TTL/(T1+T5+G67), (G23+BFL)/T2,T1/G45, BFL/(G34+G45), ALT/(G23+T3), EFL/(T6+T7), T5/(G45+G56),(G23+T5)/T6, (T6+T7)/(G34+G45) and ALT/(G56+T6+G67) of the presentembodiment.

As the longitudinal spherical aberration shown in FIG. 11(a), the offsetof the off-axis light relative to the image point may be within−0.1˜40.02 mm. As the curvature of field in the sagittal direction shownin FIG. 11(b), the focus variation with regard to the three wavelengthsin the whole field may fall within −0.15˜0 mm. As the curvature of fieldin the tangential direction shown in FIG. 11(c), the focus variationwith regard to the three wavelengths in the whole field may fall within−0.25˜0 mm. As shown in FIG. 11(d), the variation of the distortionaberration may be within 0˜20%. Compared with the first embodiment, thecurvature of field in the sagittal direction and the distortionaberration of the present embodiment are smaller.

According to the values of the aberrations, it is shown that the opticalimaging lens 2 of the present embodiment, with Fno as small as 1.500,the image height as great as 4.788 mm and the system length as short as7.198 mm, may be capable of providing good imaging quality.

Reference is now made to FIGS. 14-17. FIG. 14 illustrates an examplecross-sectional view of an optical imaging lens 3 having seven lenselements of the optical imaging lens according to a third exampleembodiment. FIG. 15 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 3 according to the third example embodiment. FIG. 16 shows anexample table of optical data of each lens element of the opticalimaging lens 3 according to the third example embodiment. FIG. 17 showsan example table of aspherical data of the optical imaging lens 3according to the third example embodiment.

As shown in FIG. 14, the optical imaging lens 3 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop STO, a first lens elementL1, a second lens element L2, a third lens element L3, a fourth lenselement L4, a fifth lens element L5, a sixth lens element L6 and aseventh lens element L7.

The differences between the third embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data and related opticalparameters, such as back focal length; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L4A1, L5A1, L6A1, and L7A1 facing to the object sideA1 and the image-side surfaces L1A2, L2A2, L3A2, L4A2, L5A2, L6A2 andL7A2 facing to the image side A2, and positive or negative configurationof the refracting power of each lens element may be similar to those inthe first embodiment. Please refer to FIG. 16 for the opticalcharacteristics of each lens elements in the optical imaging lens 3 ofthe present embodiment, and please refer to FIGURE for the values of(T5+ImgH)/Fno, ALT/Fno, T5/(G56+T6), (T2+G23+T3)/T1, AAG/(G45+T5),(T1+BFL)/(T3+G34), TL/(G23+G67), (T1+G23)/T4, (T7+BFL)/(T1+G12),EFL/(G12+G23+G67), TTL/(T1+T5+G67), (G23+BFL)/T2, T1/G45, BFL/(G34+G45),ALT/(G23+T3), EFL/(T6+T7), T5/(G45+G56), (G23+T5)/T6, (T6+T7)/(G34+G45)and ALT/(G56+T6+G67) of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 15(a), the offsetof the off-axis light relative to the image point may be within−0.18˜0.02 mm. As the curvature of field in the sagittal direction shownin FIG. 15(b), the focus variation with regard to the three wavelengthsin the whole field may fall within −0.18˜0 mm. As the curvature of fieldin the tangential direction shown in FIG. 15(c), the focus variationwith regard to the three wavelengths in the whole field may fall within−0.2˜0.04 mm. As shown in FIG. 15(d), the variation of the distortionaberration may be within 0˜30%. Compared with the first embodiment, thelongitudinal spherical aberration may be smaller in the presentembodiment.

According to the values of the aberrations, it is shown that the opticalimaging lens 3 of the present embodiment, with Fno as small as 1.500,the image height as great as 4.788 mm and the system length as short as7.206 mm, may be capable of providing good imaging quality.

Reference is now made to FIGS. 18-21. FIG. 18 illustrates an examplecross-sectional view of an optical imaging lens 4 having seven lenselements of the optical imaging lens according to a fourth exampleembodiment. FIG. 19 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 4 according to the fourth embodiment. FIG. 20 shows an exampletable of optical data of each lens element of the optical imaging lens 4according to the fourth example embodiment. FIG. 21 shows an exampletable of aspherical data of the optical imaging lens 4 according to thefourth example embodiment.

As shown in FIG. 18, the optical imaging lens 4 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop STO, a first lens elementL1, a second lens element L2, a third lens element L3, a fourth lenselement L4, a fifth lens element L5, a sixth lens element L6 and aseventh lens element L7.

The differences between the fourth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surfaces L4A2, L5A2; but the configuration ofthe concave/convex shape of surfaces, comprising the object-sidesurfaces L1A1, L2A1, L3A1, L4A1, L5A1, L6A1 and L7A1 facing to theobject side A1 and the image-side surfaces L1A2, L2A2, L3A2, L6A2 andL7A2 facing to the image side A2, and positive or negative configurationof the refracting power of each lens element may be similar to those inthe first embodiment. Specifically, a periphery region L4A2P of theimage-side surface L4A2 of the fourth lens element L4 may be convex, anda periphery region L5A2P of the image-side surface L5A2 of the fifthlens element L5 may be convex. Please refer to FIG. 20 for the opticalcharacteristics of each lens elements in the optical imaging lens 4 ofthe present embodiment, please refer to FIG. 46 for the values of(T5+ImgH)/Fno, ALT/Fno, T5/(G56+T6), (T2+G23+T3)/T1, AAG/(G45+T5),(T1+BFL)/(T3+G34), TL/(G23+G67), (T1+G23)/T4, (T7+BFL)/(T1+G12),EFL/(G12+G23+G67), TTL/(T1+T5+G67), (G23+BFL)/T2, T1/G45, BFL/(G34+G45),ALT/(G23+T3), EFL/(T6+T7), T5/(G45+G56), (G23+T5)/T6, (T6+T7)/(G34+G45)and ALT/(G56+T6+G67) of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 19(a), the offsetof the off-axis light relative to the image point may be within−0.09˜0.01 mm. As the curvature of field in the sagittal direction shownin FIG. 19(b), the focus variation with regard to the three wavelengthsin the whole field may fall within −0.1˜0.04 mm. As the curvature offield in the tangential direction shown in FIG. 19(c), the focusvariation with regard to the three wavelengths in the whole field mayfall within −0.14˜0 mm. As shown in FIG. 19(d), the variation of thedistortion aberration may be within 0˜25%. Compared with the firstembodiment, the longitudinal spherical aberration and the curvature offield in the tangential direction may be smaller in the presentembodiment.

According to the values of the aberrations, it is shown that the opticalimaging lens 4 of the present embodiment, with Fno as small as 1.500,the image height as great as 4.788 mm and the system length as short as7.303 mm, may be capable of providing good imaging quality.

Reference is now made to FIGS. 22-25. FIG. 22 illustrates an examplecross-sectional view of an optical imaging lens 5 having seven lenselements of the optical imaging lens according to a fifth exampleembodiment. FIG. 23 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 5 according to the fifth embodiment. FIG. 24 shows an example tableof optical data of each lens element of the optical imaging lens 5according to the fifth example embodiment. FIG. 25 shows an exampletable of aspherical data of the optical imaging lens 5 according to thefifth example embodiment.

As shown in FIG. 22, the optical imaging lens 5 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop STO, a first lens elementL1, a second lens element L2, a third lens element L3, a fourth lenselement L4, a fifth lens element L5, a sixth lens element L6 and aseventh lens element L7.

The differences between the fifth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of surfaces, comprising the object-side surface L5A1 and theimage-side surfaces L1A2, L5A2; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L4A1, L6A1 and L7A1 facing to the object side A1 andthe image-side surfaces L2A2, L3A2, L4A2, L6A2 and L7A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, a periphery region L1A2P of the image-sidesurface L1A2 of the first lens element L1 may be convex, a peripheryregion L5A1P of the object-side surface L5A1 of the fifth lens elementL5 may be concave and a periphery region L5A2P of the image-side surfaceL5A2 of the fifth lens element L5 may be convex. Please refer to FIG. 24for the optical characteristics of each lens elements in the opticalimaging lens 5 of the present embodiment, please refer to FIG. 46 forthe values of (T5+ImgH)/Fno, ALT/Fno, T5/(G56+T6), (T2+G23+T3)/T1,AAG/(G45+T5), (T1+BFL)/(T3+G34), TL/(G23+G67), (T1+G23)/T4,(T7+BFL)/(T1+G12), EFL/(G12+G23+G67), TTL/(T1+T5+G67), (G23+BFL)/T2,T1/G45, BFL/(G34+G45), ALT/(G23+T3), EFL/(T6+T7), T5/(G45+G56),(G23+T5)/T6, (T6+T7)/(G34+G45) and ALT/(G56+T6+G67) of the presentembodiment.

As the longitudinal spherical aberration shown in FIG. 23(a), the offsetof the off-axis light relative to the image point may be within−0.07˜0.02 mm. As the curvature of field in the sagittal direction shownin FIG. 23(b), the focus variation with regard to the three wavelengthsin the whole field may fall within −0.08˜0 mm. As the curvature of fieldin the tangential direction shown in FIG. 23(c), the focus variationwith regard to the three wavelengths in the whole field may fall within−0.2˜0.04 mm. As shown in FIG. 23(d), the variation of the distortionaberration may be within 0˜9%. Compared with the first embodiment, thelongitudinal spherical aberration, the curvature of field in thesagittal direction and the distortion aberration may be smaller in thepresent embodiment.

According to the values of the aberrations, it is shown that the opticalimaging lens 5 of the present embodiment, with Fno as small as 1.500,the image height as great as 4.788 mm and the system length as short as7.599 mm, may be capable of providing good imaging quality.

Reference is now made to FIGS. 26-29. FIG. 26 illustrates an examplecross-sectional view of an optical imaging lens 6 having seven lenselements of the optical imaging lens according to a sixth exampleembodiment. FIG. 27 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 6 according to the sixth embodiment. FIG. 28 shows an example tableof optical data of each lens element of the optical imaging lens 6according to the sixth example embodiment. FIG. 29 shows an exampletable of aspherical data of the optical imaging lens 6 according to thesixth example embodiment.

As shown in FIG. 26, the optical imaging lens 6 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop STO, a first lens elementL1, a second lens element L2, a third lens element L3, a fourth lenselement L4, a fifth lens element L5, a sixth lens element L6 and aseventh lens element L7.

The differences between the sixth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the object-side surface L5A1 and the image-side surface L1A2;but the configuration of the concave/convex shape of surfaces,comprising the object-side surfaces L1A1, L2A1, L3A1, L4A1, L6A1 andL7A1 facing to the object side A1 and the image-side surfaces L2A2,L3A2, L4A2, L6A2 and L7A2 facing to the image side A2, and positive ornegative configuration of the refracting power of each lens elementexcept the third lens element L3 may be similar to those in the firstembodiment. Specifically, a periphery region L1A2P of the image-sidesurface L1A2 of the first lens element L1 may be convex, and a peripheryregion L5A1P of the object-side surface L5A1 of the fifth lens elementL5 may be concave. Please refer to FIG. 28 for the opticalcharacteristics of each lens elements in the optical imaging lens 6 ofthe present embodiment, please refer to FIG. 46 for the values of(T5+ImgH)/Fno, ALT/Fno, T5/(G56+T6), (T2+G23+T3)/T1, AAG/(G45+T5),(T1+BFL)/(T3+G34), TL/(G23+G67), (T1+G23)/T4, (T7+BFL)/(T1+G12),EFL/(G12+G23+G67), TTL/(T1+T5+G67), (G23+BFL)/T2, T1/G45, BFL/(G34+G45),ALT/(G23+T3), EFL/(T6+T7), T5/(G45+G56), (G23+T5)/T6, (T6+T7)/(G34+G45)and ALT/(G56+T6+G67) of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 27(a), the offsetof the off-axis light relative to the image point may be within−0.07˜0.02 mm. As the curvature of field in the sagittal direction shownin FIG. 27(b), the focus variation with regard to the three wavelengthsin the whole field may fall within −0.1˜0.1 mm. As the curvature offield in the tangential direction shown in FIG. 27(c), the focusvariation with regard to the three wavelengths in the whole field mayfall within −0.1˜0.6 mm. As shown in FIG. 27(d), the variation of thedistortion aberration may be within 0˜16%. Compared with the firstembodiment, the longitudinal spherical aberration and the distortionaberration may be smaller in the present embodiment.

According to the values of the aberrations, it is shown that the opticalimaging lens 6 of the present embodiment, with Fno as small as 1.500,the image height as great as 4.788 mm and the system length as short as7.567 mm, may be capable of providing good imaging quality.

Reference is now made to FIGS. 30-33. FIG. 30 illustrates an examplecross-sectional view of an optical imaging lens 7 having seven lenselements of the optical imaging lens according to a seventh exampleembodiment. FIG. 31 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 7 according to the seventh embodiment. FIG. 32 shows an exampletable of optical data of each lens element of the optical imaging lens 7according to the seventh example embodiment. FIG. 33 shows an exampletable of aspherical data of the optical imaging lens 7 according to theseventh example embodiment.

As shown in FIG. 30, the optical imaging lens 7 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop STO, a first lens elementL1, a second lens element L2, a third lens element L3, a fourth lenselement L4, a fifth lens element L5, a sixth lens element L6 and aseventh lens element L7.

The differences between the seventh embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surface L1A2; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L4A1, L5A1, L6A1 and L7A1 facing to the object side A1and the image-side surfaces L2A2, L3A2, L4A2, L5A2, L6A2 and L7A2 facingto the image side A2, and positive or negative configuration of therefracting power of each lens element other than the third lens elementL3 may be similar to those in the first embodiment. Specifically, aperiphery region L1A2P of the image-side surface L1A2 of the first lenselement L1 may be convex. Please refer to FIG. 32 for the opticalcharacteristics of each lens elements in the optical imaging lens 7 ofthe present embodiment, please refer to FIG. 46 for the values of(T5+ImgH)/Fno, ALT/Fno, T5/(G56+T6), (T2+G23+T3)/T1, AAG/(G45+T5),(T1+BFL)/(T3+G34), TL/(G23+G67), (T1+G23)/T4, (T7+BFL)/(T1+G12),EFL/(G12+G23+G67), TTL/(T1+T5+G67), (G23+BFL)/T2, T1/G45, BFL/(G34+G45),ALT/(G23+T3), EFL/(T6+T7), T5/(G45+G56), (G23+T5)/T6, (T6+T7)/(G34+G45)and ALT/(G56+T6+G67) of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 31(a), the offsetof the off-axis light relative to the image point may be within−0.03˜0.025 mm. As the curvature of field in the sagittal directionshown in FIG. 31(b), the focus variation with regard to the threewavelengths in the whole field may fall within −0.1˜0.05 mm. As thecurvature of field in the tangential direction shown in FIG. 31(c), thefocus variation with regard to the three wavelengths in the whole fieldmay fall within −0.25˜0.1 mm. As shown in FIG. 31(d), the variation ofthe distortion aberration may be within 0˜25%. Compared with the firstembodiment, the longitudinal spherical aberration and the curvature offield in the sagittal direction may be smaller in the presentembodiment.

According to the values of the aberrations, it is shown that the opticalimaging lens 7 of the present embodiment, with Fno as small as 1.500,the image height as great as 4.788 mm and the system length as short as7.581 mm, may be capable of providing good imaging quality.

Reference is now made to FIGS. 34-37. FIG. 34 illustrates an examplecross-sectional view of an optical imaging lens 8 having seven lenselements of the optical imaging lens according to an eighth exampleembodiment. FIG. 35 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 8 according to the eighth embodiment. FIG. 36 shows an exampletable of optical data of each lens element of the optical imaging lens 8according to the eighth example embodiment. FIG. 37 shows an exampletable of aspherical data of the optical imaging lens 8 according to theeighth example embodiment.

As shown in FIG. 34, the optical imaging lens 8 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop STO, a first lens elementL1, a second lens element L2, a third lens element L3, a fourth lenselement L4, a fifth lens element L5, a sixth lens element L6 and aseventh lens element L7.

The differences between the eighth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the object-side surface L5A1 and the image-side surfaces L1A2,L4A2, L5A2; but the configuration of the concave/convex shape ofsurfaces comprising the object-side surfaces L1A1, L2A1, L3A1, L4A1,L6A1 and L7A1 facing to the object side A1 and the image-side surfacesL2A2, L3A2, L6A2 and L7A2 facing to the image side A2, and positive ornegative configuration of the refracting power of each lens element maybe similar to those in the first embodiment. Specifically, an opticalaxis region L1A2C of the image-side surface L1A2 of the first lenselement L1 may be convex, a periphery region L4A2P of the image-sidesurface L4A2 of the fourth lens element L4 may be convex, a peripheryregion L5A1P of the object-side surface L5A1 of the fifth lens elementL5 may be concave and a periphery region L5A2P of the image-side surfaceL5A2 of the fifth lens element L5 may be convex. Please refer to FIG. 36for the optical characteristics of each lens elements in the opticalimaging lens 8 of the present embodiment, and please refer to FIG. 46for the values of (T5+ImgH)/Fno, ALT/Fno, T5/(G56+T6), (T2+G23+T3)/T1,AAG/(G45+T5), (T1+BFL)/(T3+G34), TL/(G23+G67), (T1+G23)/T4,(T7+BFL)/(T1+G12), EFL/(G12+G23+G67), TTL/(T1+T5+G67), (G23+BFL)/T2,T1/G45, BFL/(G34+G45), ALT/(G23+T3), EFL/(T6+T7), T5/(G45+G56),(G23+T5)/T6, (T6+T7)/(G34+G45) and ALT/(G56+T6+G67) of the presentembodiment.

As the longitudinal spherical aberration shown in FIG. 35(a), the offsetof the off-axis light relative to the image point may be within−0.08˜0.02 mm. As the curvature of field in the sagittal direction shownin FIG. 35(b), the focus variation with regard to the three wavelengthsin the whole field may fall within −0.1˜−0.02 mm. As the curvature offield in the tangential direction shown in FIG. 35(c), the focusvariation with regard to the three wavelengths in the whole field mayfall within −0.2˜0.04 mm. As shown in FIG. 35(d), the variation of thedistortion aberration may be within 0˜30%. Compared with the firstembodiment, the longitudinal spherical aberration and the curvature offield in the sagittal direction are smaller in the present embodiment.

According to the values of the aberrations, it is shown that the opticalimaging lens 8 of the present embodiment, with Fno as small as 1.500,the image height as great as 4.788 mm and the system length as short as7.986 mm, may be capable of providing good imaging quality.

Reference is now made to FIGS. 38-41. FIG. 38 illustrates an examplecross-sectional view of an optical imaging lens 9 having seven lenselements of the optical imaging lens according to a ninth exampleembodiment. FIG. 39 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 9 according to the ninth embodiment. FIG. 40 shows an example tableof optical data of each lens element of the optical imaging lens 9according to the ninth example embodiment. FIG. 41 shows an exampletable of aspherical data of the optical imaging lens 9 according to theninth example embodiment.

As shown in FIG. 38, the optical imaging lens 9 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop STO, a first lens elementL1, a second lens element L2, a third lens element L3, a fourth lenselement L4, a fifth lens element L5, a sixth lens element L6 and aseventh lens element L7.

The differences between the ninth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the object-side surface L5A1 and the image-side surface L4A2;but the configuration of the concave/convex shape of surfaces comprisingthe object-side surfaces L1A1, L2A1, L3A1, L4A1, L6A1 and L7A1 facing tothe object side A1 and the image-side surfaces L1A2, L2A2, L3A2, L6A2and L7A2 facing to the image side A2, and positive or negativeconfiguration of the refracting power of each lens element may besimilar to those in the first embodiment. Specifically, a peripheryregion L4A2P of the image-side surface L4A2 of the fourth lens elementL4 may be convex and a periphery region L5A1P of the object-side surfaceL5A1 of the fifth lens element L5 may be concave. Please refer to FIG.40 for the optical characteristics of each lens elements in the opticalimaging lens 9 of the present embodiment, please refer to FIG. 46 forthe values of (T5+ImgH)/Fno, ALT/Fno, T5/(G56+T6), (T2+G23+T3)/T1,AAG/(G45+T5), (T1+BFL)/(T3+G34), TL/(G23+G67), (T1+G23)/T4,(T7+BFL)/(T1+G12), EFL/(G12+G23+G67), TTL/(T1+T5+G67), (G23+BFL)/T2,T1/G45, BFL/(G34+G45), ALT/(G23+T3), EFL/(T6+T7), T5/(G45+G56),(G23+T5)/T6, (T6+T7)/(G34+G45) and ALT/(G56+T6+G67) of the presentembodiment.

As the longitudinal spherical aberration shown in FIG. 39(a), the offsetof the off-axis light relative to the image point may be within−0.04˜0.015 mm. As the curvature of field in the sagittal directionshown in FIG. 39(b), the focus variation with regard to the threewavelengths in the whole field may fall within −0.06˜0 mm. As thecurvature of field in the tangential direction shown in FIG. 39(c), thefocus variation with regard to the three wavelengths in the whole fieldmay fall within −0.14˜0.04 mm. As shown in FIG. 39(d), the variation ofthe distortion aberration may be within 0˜30%. Compared with the firstembodiment, the longitudinal spherical aberration and the curvature offield in both the sagittal and tangential directions are smaller here.

According to the values of the aberrations, it is shown that the opticalimaging lens 9 of the present embodiment, with Fno as small as 1.500,the image height as great as 4.788 mm and the system length as short as7.407 mm, may be capable of providing good imaging quality.

Reference is now made to FIGS. 42-45. FIG. 42 illustrates an examplecross-sectional view of an optical imaging lens 10 having seven lenselements of the optical imaging lens according to a tenth exampleembodiment. FIG. 43 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 10 according to the tenth embodiment. FIG. 44 shows an exampletable of optical data of each lens element of the optical imaging lens10 according to the tenth example embodiment. FIG. 45 shows an exampletable of aspherical data of the optical imaging lens 10 according to thetenth example embodiment.

As shown in FIG. 42, the optical imaging lens 10 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise an aperture stop STO, a first lens elementL1, a second lens element L2, a third lens element L3, a fourth lenselement L4, a fifth lens element L5, a sixth lens element L6 and aseventh lens element L7.

The differences between the tenth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the object-side surfaces L2A1, L3A1, L5A1 and the image-sidesurfaces L1A2, L4A2; but the configuration of the concave/convex shapeof surfaces comprising the object-side surfaces L1A1, L4A1, L6A1 andL7A1 facing to the object side A1 and the image-side surfaces L2A2,L3A2, L5A2, L6A2 and L7A2 facing to the image side A2, and positive ornegative configuration of the refracting power of each lens element maybe similar to those in the first embodiment. Specifically, thedifferences of configuration of surface shape may include: a peripheryregion L1A2P of the image-side surface L1A2 of the first lens element L1may be convex, a periphery region L2A1P of the object-side surface L2A1of the second lens element L2 may be concave, an optical axis regionL3A1C of the object-side surface L3A1 of the third lens element L3 maybe convex, a periphery region L3A1P of the object-side surface L3A1 ofthe third lens element L3 may be convex, a periphery region L4A2P of theimage-side surface L4A2 of the fourth lens element L4 may be convex anda periphery region L5A1P of the object-side surface L5A1 of the fifthlens element L5 may be concave. Please refer to FIG. 44 for the opticalcharacteristics of each lens elements in the optical imaging lens 10 ofthe present embodiment, and please refer to FIG. 46 for the values of(T5+ImgH)/Fno, ALT/Fno, T5/(G56+T6), (T2+G23+T3)/T1, AAG/(G45+T5),(T1+BFL)/(T3+G34), TL/(G23+G67), (T1+G23)/T4, (T7+BFL)/(T1+G12),EFL/(G12+G23 +G67), TTL/(T1+T5+G67), (G23+BFL)/T2, T1/G45,BFL/(G34+G45), ALT/(G23+T3), EFL/(T6+T7), T5/(G45+G56), (G23+T5)/T6,(T6+T7)/(G34+G45) and ALT/(G56+T6+G67) of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 43(a), the offsetof the off-axis light relative to the image point may be within−0.12˜0.02 mm. As the curvature of field in the sagittal direction shownin FIG. 43(b), the focus variation with regard to the three wavelengthsin the whole field may fall within −0.12˜0 mm. As the curvature of fieldin the tangential direction shown in FIG. 43(c), the focus variationwith regard to the three wavelengths in the whole field may fall within−0.12˜0.1 mm. As shown in FIG. 43(d), the variation of the distortionaberration may be within 0˜45%. Compared with the first embodiment, thelongitudinal spherical aberration and the curvatures of field in thesagittal direction are smaller.

According to the values of the aberrations, it is shown that the opticalimaging lens 10 of the present embodiment, with Fno as small as 1.580,the image height as great as 4.788 mm and the system length as short as6.124 mm, may be capable of providing good imaging quality. Comparedwith the first embodiment, the system length may be shorter in thepresent embodiment.

Please refer to FIG. 46 for the values of (T5+ImgH)/Fno, ALT/Fno,T5/(G56+T6), (T2+G23+T3)/T1, AAG/(G45+T5), (T1+BFL)/(T3+G34),TL/(G23+G67), (T1+G23)/T4, (T7+BFL)/(T1+G12), EFL/(G12+G23+G67),TTL/(T1+T5+G67), (G23+BFL)/T2, T1/G45, BFL/(G34+G45), ALT/(G23+T3),EFL/(T6+T7), T5/(G45+G56), (G23+T5)/T6, (T6+T7)/(G34+G45) andALT/(G56+T6+G67) of all ten embodiments, and the optical imaging lens ofthe present disclosure may satisfy at least one of Inequalities(1)˜(20). Further, any range of which the upper and lower limits definedby the values disclosed in all of the embodiments herein may beimplemented in the present embodiments.

According to above illustration, the longitudinal spherical aberration,curvature of field in both the sagittal direction and tangentialdirection and distortion aberration in all embodiments may meet the userrequirement of a related product in the market. The off-axis light withregard to three different wavelengths (470 nm, 555 nm, 650 nm) may befocused around an image point and the offset of the off-axis lightrelative to the image point may be well controlled with suppression forthe longitudinal spherical aberration, curvature of field both in thesagittal direction and tangential direction and distortion aberration.The curves of different wavelengths may be close to each other, and thisrepresents that the focusing for light having different wavelengths maybe good to suppress chromatic dispersion. In summary, lens elements aredesigned and matched for achieving good imaging quality.

While various embodiments in accordance with the disclosed principlesare described above, it should be understood that they are presented byway of example only, and are not limiting. Thus, the breadth and scopeof example embodiment(s) should not be limited by any of theabove-described embodiments, but should be defined only in accordancewith the claims and their equivalents issuing from this disclosure.Furthermore, the above advantages and features are provided in describedembodiments, but shall not limit the application of such issued claimsto processes and structures accomplishing any or all of the aboveadvantages. Further, all of the numerical ranges including the maximumand minimum values and the values therebetween which are obtained fromthe combining proportion relation of the optical parameters disclosed ineach embodiment of the present disclosure are implementable.

Additionally, the section headings herein are provided for consistencywith the suggestions under 37 C.F.R. 1.77 or otherwise to provideorganizational cues. These headings shall not limit or characterize theinvention(s) set out in any claims that may issue from this disclosure.Specifically, a description of a technology in the “Background” is notto be construed as an admission that technology is prior art to anyinvention(s) in this disclosure. Furthermore, any reference in thisdisclosure to “invention” in the singular should not be used to arguethat there is only a single point of novelty in this disclosure.Multiple inventions may be set forth according to the limitations of themultiple claims issuing from this disclosure, and such claimsaccordingly define the invention(s), and their equivalents, that areprotected thereby. In all instances, the scope of such claims shall beconsidered on their own merits in light of this disclosure, but shouldnot be constrained by the headings herein.

What is claimed is:
 1. An optical imaging lens, comprising a firstelement, a second element, a third element, a fourth element, a fifthlens element, a sixth lens element and a seventh lens elementsequentially from an object side to an image side along an optical axis,each of the first, second, third, fourth, fifth, sixth and seventh lenselement having an object-side surface facing toward the object side andallowing imaging rays to pass through and an image-side surface facingtoward the image side and allowing the imaging rays to pass through,wherein: the second lens element has negative refracting power; aperiphery region of the object-side surface of the third lens element isconcave; the fourth lens element has negative refracting power; anoptical axis region of the object-side surface of the sixth lens elementis convex; an optical axis region of the object-side surface of theseventh lens element is convex; and lens elements of the optical imaginglens consist of the seven lens elements described above; and a thicknessof the fifth lens element along the optical axis is represented by T5,an image height of the optical imaging lens is represented by ImgH, af-number of the optical imaging lens is represented by Fno, and theoptical imaging lens satisfies the inequality:(T5+ImgH)/Fno≥3.200 mm.
 2. The optical imaging lens according to claim1, wherein a thickness of the second lens element along the optical axisis represented by T2, a distance from the image-side surface of thesecond lens element to the object-side surface of the third lens elementalong the optical axis is represented by G23, a thickness of the thirdlens element along the optical axis is represented by T3, a thickness ofthe first lens element along the optical axis is represented by T1, andT2, G23, T3 and T1 satisfy the inequality:(T2+G23+T3)/T1≤2.400.
 3. The optical imaging lens according to claim 1,wherein a sum of six air gaps from the first lens element to the seventhlens element along the optical axis is represented by AAG, a distancefrom the image-side surface of the fourth lens element to theobject-side surface of the fifth lens element along the optical axis isrepresented by G45, and AAG, G45 and T5 satisfy the inequality:AAG/(G45+T5)≤2.100.
 4. The optical imaging lens according to claim 1,wherein a thickness of the first lens element along the optical axis isrepresented by T1, a distance from the image-side surface of the seventhlens element to an image plane along the optical axis is represented byBFL, a thickness of the third lens element along the optical axis isrepresented by T3, a distance from the image-side surface of the thirdlens element to the object-side surface of the fourth lens element alongthe optical axis is represented by G34, and T1, BFL, T3 and G34 satisfythe inequality:(T1+BFL)/(T3+G34)≥2.800.
 5. The optical imaging lens according to claim1, wherein a distance from the object-side surface of the first lenselement to the image-side surface of the seventh lens element along theoptical axis is represented by TL, a distance from the image-sidesurface of the second lens element to the object-side surface of thethird lens element along the optical axis is represented by G23, adistance from the image-side surface of the sixth lens element to theobject-side surface of the seventh lens element along the optical axisis represented by G67, and TL, G23 and G37 satisfy the inequality:TL/(G23+G67)≤5.800.
 6. The optical imaging lens according to claim 1,wherein a thickness of the first lens element along the optical axis isrepresented by T1, a distance from the image-side surface of the secondlens element to the object-side surface of the third lens element alongthe optical axis is represented by G23, a thickness of the fourth lenselement along the optical axis is represented by T4, and T1, G23 and T4satisfy the inequality:(T1+G23)/T4≥2.700.
 7. The optical imaging lens according to claim 1,wherein a thickness of the seventh lens element along the optical axisis represented by T7, a distance from the image-side surface of theseventh lens element to an image plane along the optical axis isrepresented by BFL, a thickness of the first lens element along theoptical axis is represented by T1, a distance from the image-sidesurface of the first lens element to the object-side surface of thesecond lens element along the optical axis is represented by G12, andT7, BFL, T1 and G12 satisfy the inequality:(T7+BFL)/(T1+G12)≥1.400.
 8. An optical imaging lens, comprising a firstelement, a second element, a third element, a fourth element, a fifthlens element, a sixth lens element and a seventh lens elementsequentially from an object side to an image side along an optical axis,each of the first, second, third, fourth, fifth, sixth and seventh lenselement having an object-side surface facing toward the object side andallowing imaging rays to pass through and an image-side surface facingtoward the image side and allowing the imaging rays to pass through,wherein: an optical axis region of the object-side surface of the secondlens element is convex; a periphery region of the object-side surface ofthe third lens element is concave; an optical axis region of theobject-side surface of the fourth lens element is convex; the sixth lenselement has positive refracting power; lens elements of the opticalimaging lens consist of the seven lens elements described above; and asum of the thicknesses of all seven lens elements along the optical axisis represented by ALT, a f-number of the optical imaging lens isrepresented by Fno, a thickness of the fifth lens element along theoptical axis is represented by T5, a distance from the image-sidesurface of the fifth lens element to the object-side surface of thesixth lens element along the optical axis is represented by G56, athickness of the sixth lens element along the optical axis isrepresented by T6, and the optical imaging lens satisfies theinequalities:ALT/Fno≥2.300 mm; andT5/(G56+T6)≥1.400.
 9. The optical imaging lens according to claim 8,wherein an effective focal length of the optical imaging lens isrepresented by EFL, a distance from the image-side surface of the firstlens element to the object-side surface of the second lens element alongthe optical axis is represented by G12, a distance from the image-sidesurface of the second lens element to the object-side surface of thethird lens element along the optical axis is represented by G23, adistance from the image-side surface of the sixth lens element to theobject-side surface of the seventh lens element along the optical axisis represented by G67, and EFL, G12, G23 and G67 satisfy the inequality:EFL/(G12+G23+G67)≤5.000.
 10. The optical imaging lens according to claim8, wherein a distance from the object-side surface of the first lenselement to an image plane along the optical axis is represented by TTL,a thickness of the first lens element along the optical axis isrepresented by T1, a distance from the image-side surface of the sixthlens element to the object-side surface of the seventh lens elementalong the optical axis is represented by G67, and TTL, T1, T5 and G67satisfy the inequality:TTL/(T1+T5+G67)≤3.500.
 11. The optical imaging lens according to claim8, wherein a distance from the image-side surface of the second lenselement to the object-side surface of the third lens element along theoptical axis is represented by G23, a distance from the image-sidesurface of the seventh lens element to an image plane along the opticalaxis is represented by BFL, a thickness of the second lens element alongthe optical axis is represented by T2, and G23, BFL and T2 satisfy theinequality:(G23+BFL)/T2≥4.800.
 12. The optical imaging lens according to claim 8,wherein a thickness of the first lens element along the optical axis isrepresented by T1, a distance from the image-side surface of the fourthlens element to the object-side surface of the fifth lens element alongthe optical axis is represented by G45, and T1 and G45 satisfy theinequality:T1/G45≥1.300.
 13. The optical imaging lens according to claim 8, whereina distance from the image-side surface of the seventh lens element to animage plane along the optical axis is represented by BFL, a distancefrom the image-side surface of the third lens element to the object-sidesurface of the fourth lens element along the optical axis is representedby G34, a distance from the image-side surface of the fourth lenselement to the object-side surface of the fifth lens element along theoptical axis is represented by G45, and BFL, G34 and G45 satisfy theinequality:BFL/(G34+G45)≥2.000.
 14. The optical imaging lens according to claim 8,wherein a sum of the thicknesses of all seven lens elements along theoptical axis is represented by ALT, a distance from the image-sidesurface of the second lens element to the object-side surface of thethird lens element along the optical axis is represented by G23, athickness of the third lens element along the optical axis isrepresented by T3, and ALT, G23 and T3 satisfy the inequality:ALT/(G23+T3)≤4.500.
 15. An optical imaging lens, comprising a firstelement, a second element, a third element, a fourth element, a fifthlens element, a sixth lens element and a seventh lens elementsequentially from an object side to an image side along an optical axis,each of the first, second, third, fourth, fifth, sixth and seventh lenselement having an object-side surface facing toward the object side andallowing imaging rays to pass through and an image-side surface facingtoward the image side and allowing the imaging rays to pass through,wherein: an optical axis region of the object-side surface of the thirdlens element is concave; an optical axis region of the object-sidesurface of the fourth lens element is convex; the sixth lens element haspositive refracting power; lens elements of the optical imaging lensconsist of the seven lens elements described above; and a sum of thethicknesses of all seven lens elements along the optical axis isrepresented by ALT, a f-number of the optical imaging lens isrepresented by Fno, a thickness of the fifth lens element along theoptical axis is represented by T5, a distance from the image-sidesurface of the fifth lens element to the object-side surface of thesixth lens element along the optical axis is represented by G56, athickness of the sixth lens element along the optical axis isrepresented by T6, and the optical imaging lens satisfies theinequalities:ALT/Fno≥2.300 mm; andT5/(G56+T6)≥1.400.
 16. The optical imaging lens according to claim 15,wherein an effective focal length of the optical imaging lens isrepresented by EFL, a thickness of the seventh lens element along theoptical axis is represented by T7, and EFL, T6 and T7 satisfy theinequality:EFL/(T6+T7)≥4.500.
 17. The optical imaging lens according to claim 15,wherein a distance from the image-side surface of the fourth lenselement to the object-side surface of the fifth lens element along theoptical axis is represented by G45, and T5, G45 and G56 satisfy theinequality:T5/(G45+G56)≥1.700.
 18. The optical imaging lens according to claim 15,wherein a distance from the image-side surface of the second lenselement to the object-side surface of the third lens element along theoptical axis is represented by G23, G23, T5 and T6 satisfy theinequality:(G23+T5)/T6≥2.500.
 19. The optical imaging lens according to claim 15,wherein a thickness of the seventh lens element along the optical axisis represented by T7, a distance from the image-side surface of thethird lens element to the object-side surface of the fourth lens elementalong the optical axis is represented by G34, a distance from theimage-side surface of the fourth lens element to the object-side surfaceof the fifth lens element along the optical axis is represented by G45,and T6, T7, G34 and G45 satisfy the inequality:(T6+T7)/(G34+G45)≥1.400.
 20. The optical imaging lens according to claim15, wherein a distance from the image-side surface of the sixth lenselement to the object-side surface of the seventh lens element along theoptical axis is represented by G67, and ALT, G56, T6 and G67 satisfy theinequality:ALT/(G56+T6+G67)≤4.000.